Before automatically trumping, take a look at the suit distribution.
Is there a suit with a sure loser in it? If so …
- Would it be advantageous to clear the suit for later trumping?
- Could you be over-trumped by the next player?
- Would an additional trump trick later be better than taking an early trick when you will lose a trick in that suit later anyway?
Consider discarding a losing card early, so that your hand is stronger for the finish of play.